Flushmaster Outboard Flushing System - 4 Outlet w/Four 20' Hose Kits [SM-FM4020]Outboard Flushing System 4 Outlet with Four 20' Hose Kits The Flushmaster is a portable, marine grade device designed to automate the flushing process for up to four outboard motors. Powered by (3) AA batteries, it ensures thorough engine cleaning by flushing each motor sequentially before automatically shutting off. With its IP67 waterproof certification, the Flushmaster is built to last, offering a convenient and time saving solution for outboard